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jjlamshushushu 发表于 2014-5-30 18:05 , h! y# ~4 b2 ^" L- Y
UL医疗插头,张力缓冲测试?测试规范呢?
9 g+ H3 x5 g0 L* @& D4 U# c: N109 Strain Relief Tests' w$ [2 X/ l+ K4 X
109.1 General
1 d" G: R) J6 t3 X$ G109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any( e# f% a' i- W! r- A
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32/ ^1 Q0 A$ A6 t; W* ^" R/ J/ E
inch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the
* m. `* w7 v# b; O' @7 j' Lattachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path
: p8 h. h L+ {4 gintegrity.
) ^' T7 ^/ p5 I. H4 r7 R+ m$ x" i109.2 Method A – Static pull8 K- Z8 Z8 A, _* \' s3 g
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
) P9 h+ p( b J, t0 c% k9 vterminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)
) ^4 P3 i# {8 _0 G c& ^/ Y3 B( ]to the free end of the cord while the attachment plug is securely supported. The force shall be applied for
) \" o1 Y, P) |1 m% U6 B1 minute in a direction perpendicular to the plane of cord entry.7 C7 O# K. {: M
109.3 Method B – Rotary pull
# f% S7 i) F2 ^5 J) [6 s1 g109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors; I* a$ X$ I3 j$ y
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
8 w+ f8 e5 Y- `lbf (44.5 N) is applied for 2 hours. The cord is to be rotated at a rate of approximately 9 r/min in a 3 inch( s7 B8 E+ q/ W+ s
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly
& d' f5 _, t2 n/ lmounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
& ~& W# L& N1 K3 }4 o# TStandard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the$ S3 T9 j9 }; R" f' Z
Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
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